CVE-2025-5197: A Regular Expression Denial of Service (ReDoS) vulnerability exists in the Hugging Face Transformers library, specifical
Summary
A ReDoS vulnerability (regular expression denial of service, where a specially crafted input causes a regex pattern to consume excessive CPU) exists in Hugging Face Transformers library version 4.51.3 and earlier, in a function that converts TensorFlow model weight names to PyTorch format. An attacker can exploit this with malicious input strings to crash services or exhaust system resources.
Solution / Mitigation
Update to version 4.53.0 or later, which fixes the vulnerability.
Vulnerability Details
EPSS: 0.0%
Classification
Taxonomy References
Affected Vendors
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Original source: https://nvd.nist.gov/vuln/detail/CVE-2025-5197
First tracked: February 15, 2026 at 08:37 PM
Classified by LLM (prompt v3) · confidence: 95%